Solar System Crossword

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Across
  1. 1. I am known as a "dirty snowball"?
  2. 2. I am known as the "W"Shape?
  3. 4. I am known as a "shooting star"?
  4. 7. Planets I am a celestial body orbiting the sun?
  5. 8. I am the first to believe in Heliocentric?
Down
  1. 1. I am known as the Ursa major?
  2. 2. Most of the time I am between Mars and Jupiter?
  3. 3. All planets have me except Mercury and Venus?
  4. 5. I am something that reaches earth's surface?
  5. 6. I am chunks of rocks?